Drilling apparatus



Jan. 24, 19.39. M. P. HOLMES DRILLING APPARATUS Filed Nov. 16, 1931 3 Sheets-Sheet l Jan. 24, i939.

M. P. HOLMES DRILLING-APPARATUS Filed Nov. 16, 1931 3 Sheets-Sheet 2 :mmmmmu-I-I-I-I-InI- Mkm/SREfiWs. @g'

Jan. 24, 1939. M. P. HOLMES 2,144,627

DRILLING APPARATUS Filed Nov. 16, 1951 s Sheets-Sheet s 1! ga 4/ I Q) 47%.

2t) other object of the inventionis to provide imfront truck wheels; a swivel frame H. Pivotally 20 takensubstantiallyion"lineli sjofFigie. member 23 slidably mounted on the adjacent 4,5

the self propelled tracksupported andguided mounted hub portions, 28 integral with the 55 Patented Jan.24, 1939 i r 2,144,627

P T T; F F

lldorrisP.v Holmes, ,Claremont, N. IL, assignor to "Sullivan Machinery Company, a corporation of Massachusetts fApiilication'lvovember 16, 1931; Serial No. 575,273

9 Claims. ((1255-47) This inventionrelates to drilling apparatus and type generally comprising a truck frame I mountm p i u r {b n 'y; drilling ed on wheels 2 adapted to run along a tr'ackway 3. apparatus especially adapted" tense: in drilling Adjustably mounted on the forward end of the shot or blast holes inmines. 7 truck frame is an elongated boom's'tructure 'gem 5 An object of this invention is'to provide an erally designated L'having adjustably "mounted 5 improved drilling'appara'tus;gAnother object is thereon at its outer extremity a drilling impleto provide an improved drilling apparatus espementi. Supported on the truck frame is a motor cially adapted for drilling shot or blast holes in Swhich is operatively connected'to the devices mines. A further object is to provide drilling, for adjusting the boom structure, for actuating apparatus having'improv'ed adjustable. supportthe drilling implement and for driving the truck [0 ing means for theidrilling implement; 'Yet anwheels to propel the apparatus as hereinafter other object isto,provideflimproved'adjustable; described. 1 v

supporting means "for a drilling implement of a; Now referring to the improvedadjustable sup- I coal drilling apparatus whereb'yfsh'ot or blast porting structure for the drilling implement, it

holes may be drilled in the coalface 'at any dei will be noted that secured as by bolts or screws 1 15 sired location. A still further object is to bro: to theforward end of the motor housing 8 is a 'vide improved adjustable supporting means for bracket 9 having pivotally mounted thereon for a drilling implement whereby the various adjust horizontal swinging movement relative thereto ments thereof are'ffected by power. Yet an-' aboutavertical axis Ill located in advance of the proved propelling means forsuch an apparatus mounted on the frame It on a horizontal axis l2 These and other objects of this invention will, for swinging'movement in a vertical direction however, hereinafter more fullyappearin the relative thereto is a frame [3, in'turn having course of the following description'and as more rotatably mounted' thereon for rotation about its particularly pointed out'in the appended'claims. longitudinal axis relative thereto an elongated 25 In the'acc'ompanying drawings there is shown boom l4. Adjustablymounted on the outer exfor purposes of illustration one form which the tremity of the boom'for swingingmovement relainvention may vassume in practice. tive thereto about the rectangularlyrelated axes In these drawings: v. I5 and I 6 is the drilling implement 5. The motor Fig. 1 is a plan view of the illustrative embodi- B" is herein of the reversible electric type and is 30 mentof the improved drilling apparatus. arranged with its power shaft horizontally dis- Fig. 2 is aside elevational view of the drilling posed and extending longitudinally of the apapparatus shown in'Fig. l, the adjustable sup- .paratus. Connectible to the forward end of this porting structure for'the drilling implement be- P Shaft s a bevel pinion meshing With ing shown in'a plurality of positions as indicated ev s b6V61S'13, These reverse bevels are 35 in the full and dotted'lihes'p suitably journaled on a vertical shaft 20 ar g 3 a horizontal e view 'pa,rtial1y ranged with-its axis coincident with the axis In shown in plan, taken substantially on line 3 3 of swinging movement of the swivel frame ll. of Fig.2. a v These reverse bevels are alternately connectible 0 Fig, 4 is a transverse vertical sectional view "to the shaft 20 to effect rotation of the latter in taken'substahtially' on line 4+4 of Fig. 3. a, t r o pp t di t s by a s f mult ple Fig. 5 isa detail sectional view taken substam disc clutches 2| and 22 respe t v Th8SB tially on line 5-'-5 of clutches are provided with any suitable form of Fig. 6 :is a transver'selvertical"sectional 'view op at n means in ud n a e pr a s pp Fig. 7 ma longitudinally extending-vertical sec hubs of the bev l g ars 8, 9 and nt ll d y a tional view taken substantiallyon vline"|-"-I of Suitable d lever- Formed integral Wi h the vFig. 1 1 '1 s .7 v shaft 20 is a bevel pinion 2'4 meshing with a bevel Y Fig. 8 is a transverse vertical sectional view gear 25, (see Fig. 3) keyed to a horizontal shaft I taken substantiallyj on 1ine 88.- of Fig. TL- 1 26 arranged with its. axis coincident with the 50 Fig.,.9 is a detail sectionalwiew taken substanaxis I2 of vertical swinging movement of the tially on, line 9- 9 {of Fig. 7. t a boom supporting frame l3. As shown, the'swivel In this illustrative embodiment ofl :the inven- -frame ll is provided with trunnions 21', 21 suption there is shown a-lcoalidrilling apparatus of porting bearing sleeves on which are rotatably gear 3i meshing with bevel gear 32 arranged with its axis coincident with the swivel axis l5 and suitably journaled within the drill housing 33. The gear 32 meshes with a bevel gear 34 keyed to a shaft 35 arranged with its axis coincident with the swivel axis ii of the drilling implement 5. This shaft is likewise suitably journaled with in the drill housing and has keyed thereto and drives a bevel gear 36 meshing with bevel gear 31 formed integral with a hollow shaft 33. This hollow shaft is journaled within the hubs of spur gears 39 and 40 respectively, and these gears are selectively connectible to the shaft by means of multiple disc clutches II and I2 respectively.

Now referring more particularly to the specific structure of the drilling implement 5 per se, it will be observed that the gears 39, 40 respectively mesh with spur gears 43 and 44 formed on allned shafts l5 and 43 suitably journaled within the drill housing. The shaft 45 is fixed to and drives a tubular member 41 having fixed thereto at 43 and arranged centrally therein a feed screw 43. The shaft 45 is fixed to and drives a tubular member 53 telescopically arranged within the tubular member 41. The feed screw 49 is telescopically arranged within the tubular member 50 and is threadedly connected thereto at 5|. The tubular member 50 carries at its forward end a usual chuck 52 which receives the usual drill steel, not shown. As shown in Fig. '7, the disc clutches ll, 42 are provided with suitable operating means including clutch applying members 53, 53 actuated through a rod 55 extending centrally through the hollow shaft 33 and have a suitable cam operating mechanism 56 controlled by a lever 51. Interposed between the rod 55 and each of the clutch applying members are coil springs 53 which normally maintain the clutches applied and are adapted to yield upon overloading of the-clutches. It will thus be seen that when the lever 51 is swung in one direction or the other, the rod 55 is moved axially, thereby causing movement of one or the other or both of the clutch applying members 53 and 54 into their clutch applying positions. The sets of gears 39, 43 and 43, H are of different tooth ratio so that when the friction clutches ll, 12 are both applied, the tubular memhers I and 50 are rotated at different rates, thereby rotating the feed screw and feed nut at different rates to obtain a differential screw feed. and as a result the drill steel chuck 52 is fed forwardly at a relatively slow drilling speed. when the friction clutch 42 is released and the clutch II is applied, the feed nut remainsstationary as regards rotation relative to the feed screw 4!, and as a result the tubular member 50 and the drill steel chuck 52 are fed rapidly forwardly. When the clutch if is released and the clutch 32 applied, the feed nut 5| is rotated while the feed screw remains stationary as regards rotation relative to the feed nut, and as a result the drill steel chuck 52 is fed rapidly rearwardly. It will also be evident that due to the arrangement of the various driving gears and shafts relative to the axes of the swingable frames II, 3 and the boom. and the rectangularly related axes of the drilling implement, the drill steel chuck may be driven 11'- respective of the adjusted positions of the various elements about their respective axes.

Power operated means are provided for vertically swinging the boom supporting frame i3 and for rolling the boom about its longitudinal axis relative to the frame l3. The swinging mechanism for the frame l3 comprises a worm 60 connectible by a sliding clutch 6! to the reduced extension 52 of the shaft 23. This worm meshes with worm wheel 83 keyed to a horizontal shaft 84 suitably iournaled within the bracket 8.

. Formed integral with this shaft is a spur pinion meshing with a segmental gear element 66 fixed as by a screw 81 to the frame l3. It will thus be seen that when the clutch 6| is connected andone or the other of the disc clutches 2i and 22 is applied, the boom Il may be swung by power upwardly or downwardly about the axis l2 of the frame 13 as desired. The worm gears in, 53 are of the self-locking type and maintain automatically the boom in its different vertically adjusted positions. The boom II is Journaled at its rearward end for rotation about its longitudinal axis within bearing sleeves it, 68, supported within the frame l3 as shown in Fig. 7, and interposed between these bearing sleeves and keyed to the boom is a worm wheel 69. Meshing with this worm wheel is a worm Ill fixed to a shaft ll suitably iournaled within the frame l3. As shown in Fig. 3. journaled on the shaft 1| is a chain sprocket I2 and this sprocket is connectible to the shaft by a sliding clutch 13. This sprocket is connected by an endless chain II to a chain sprocket l5 keyed to the shaft 26. It will thus be seen that when the clutch I3 is connected, the boom ll may be rolled about its longitudinal axis to position the drill implement 5 in various positions about the boom axis through the connections ll, 12 and the worm gearing 69, I0. This worm gearing is also of a self-locking type and maintains automatically, when disconnected from its driving mechanism, the boom in its various positions of adjustment.

v As previously mentioned, the drilling implement 5 is swingable about rectangularly related axes relative to the boom structure. When it is desired to swing the drilling implement about the axis if, a clamp I8 operated by a set screw I1 is loosened and the drill housing 33 may then be swung within the tubular bearing mounting 13 formed on the swivel frame 19. Simply by tightening the clamp member IS, the drill housing is locked against swinging movement relative to the swivel frame Is. The drilling implement may be swung about the axis l5 by releasing a clamping element 30 threadedly connected at ll to the swivel frame 19 and operated by a hand bar 32. When the hand bar is turned to tighten the clamping element 80, the drill hous ing and swivel frame I! are held in frictional engagement but when the parts are released, the drilling implement may be freely swung about its axis ll. The drilling implement and the entire boom supporting structure therefor are swingable horizontally about the axis III of the swivel frame II. and the means for locking the parts in their different positions of adjustment comprises, as shown in Fig. 9, a split clamp 33. This clamp may be tightened by means of a screw 34 and cooperating nut 35 operated by a hand bar 38. When this clamp is tightened in frictional engagement with the depending bearing portion 31 integral with the bracket 3, the parts are locked against swinging movement.

The mechanism for driving the truck wheels to propel the apparatus along the trackway comprises'a spur pinion 90 keyed to the rear end of the motor power shaft and meshing I with a spur gear .9I fixed to a horizontal shaft reversing the motor 6.

92. Also fixed to the shaft 92 is a spur gear 93 meshing with 'a spur gear 94 fixed to a shaft 95 arranged parallel with the shaft 92. Keyed to the shafts 92, 95 respectively, are worms 96, 91 respectively, meshing with fast and slow speed worm wheels 98 and 99. These worm wheels are alternatively connectible by multiple disc clutches I and IOI, respectively, to a horizontal shaft I02. This shaft is suitably journaled within a gear casing I03 located at the rear end of the motor Band has fixed thereto atone end a chain sprocket I04 connected by an endless chain I05 to a sprocket I06 fixed to the rear truck wheel axle. The front and rear axles of the truck are connected in driving relation by a usual chainand sprocket connection I01. It will thus be seen that when one or the other of the disc clutches I00, IOI is applied; the truck Wheels may be driven through the fast and slow speed worm gear-trains at a relatively high speed or a relatively low speed. The direction of the truck wheel drive may be reversed simply by Keyed to the opposite end of the'shaft I02 is a pulley I08 connected by an endless belt I09 to a pulley IIO fixed to the driving shaft for the usualpowcr conductor cable reel III.

The general mode of operation of the improved drilling apparatus will be clearly apparent from the, description given.

and slow speed worm gear trains 96, 98 and 91, 99 under the control of the fast and slow speed disc clutches I00 and IOI,- When the working place is reached, the boom structure may be adjusted horizontally about the axisl0 of the swivel frame II simply by releasing the split clamp 83 and manually swinging the boom structure into the desired horizontal position, the split clamp thereafter being set tohold the parts in position. The boom structure may be swung upwardly and downwardly by power about the axis I2 of the frame I3 by connecting the sliding clutch 6|, the boom structure being swung by power through the worm gearing 60, 63 under the control of the disc clutches 2I, 22 to position the drilling implement in relatively high planes or relatively low planes. The boom I4 may be rotated about its longitudinal axis to move the drilling implement in different positions about the boom axis, simply by connecting the clutch I3, the boom being rotated bypower through the connections I5, M, I2 under the control of the disc clutches 2|, 22. The drilling implement may be adjusted about the rectangularly related axes I5, IB relative to the boom structure simply by releasing the clamping elements I6, 80, thereby enabling the drilling implement to be swung either vertically or horizontally relative to the boom.

As a result of this invention it will be noted that an improved drilling apparatus is provided especially adapted for drilling shot or blast holes in the coal face and having improved adjustable supporting means for the drilling implement whereby the drilling implement may be positioned at any desired location relative to the coal face. It will further be noted that by providing the power operated means for swinging and rolling the boom structure, the drilling implement may be quickly and expeditiously adjusted into different drilling positions. These The apparatus is propolled along the mine trackwa-y through the fast and other uses and advantages of the improved drilling apparatus will be clearly apparent to those skilled in the art.

While there is in this application. specifically described one form which the invention may assume in practice, it will be understood that this form of the same-is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing'from its spiritor the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a drilling apparatus, the combination of a portable base, a motoron said base, an elongat-v ed boo-m structure mounted on said base for swinging movement relative to said base and said rnctor, a drilling implement. swivelly mounted on the outer extremity of said boom structure 'to swing into different angularly related drilling positions relative thereto about rectangularly related axes, means driven by said motor for swinging said boom structure as aforesaid, and means driven by said motor for rotating and axially feeding said drilling implement relative to said boom structure irrespective of the adjusted positions of both the latter and said drilling implement.

2 In a drilling apparatus,- the combination of a portable base, a motor on said base, an elongated boom structure mounted on said base for adjustment into different positions relative to said base and said motor, a drilling implement swivelly mounted on the outer extremity. of said boom'structure to swing into different angularly related drilling positions relative thereto about rccta-ngularly related axes, means driven by said motor for adjusting said boom structure as aforesaid, and means driven by said motor for rotating and axially feeding said drilling implement relative to said boom structure irrespective of the adjusted positions of both the latter and said drilling implement. I

3. In a drilling apparatus, the combination of a portable base, an elongated boom' structure mounted on said base'fo-r swinging movement in a plurality of angularly related directions relative thereto, a drill support mounted on the outerextremity of said boom structure for rotation about the longitudinal axis of said boom structure, a drilling tool swivelly mounted on said drill support to swing into different angularly related drilling positions relative thereto, a motor, means driven by said motor for effecting swinging movement of said boom structure in one of aforesaid directions relative to said base, means driven by said motor for rotating said drill support about the longitudinal axis of said boom structure, and means driven by said motor for rotating and axially feeding said drilling tool relativeto said boom structure while the latter remains stationary as regards swinging movement.

4. In a drilling apparatus. the combination of a portable base, a swivelled frame mounted on said base for rotation relative thereto about a vertical axis, an elongated supporting structure pivotally mounted on said swivelled frame for swinging movement relative thereto about a horizontal axis extending transversely of said swivelled frame, the longitudinal axis of said supporting structure as the latter is swung about said horizontal axis, moving into different angularly related supporting positions with respe to the horizontal while said vertical axis always remains vertical, a drill support mounted on the outer extremity oi said supporting structure for rotation about the longitudinal axis of said supporting structure in any of aforesaidangularly related positions of the latter, -motor operated means for swinging said supporting structure in a vertical direction about said horizontalaxis and for rotating said drill support about the longitudinal axis of said supporting structure, a frame swivelly mounted on said drill support to swing relative thereto about an axis at right angles to said axis of rotation of said drill support, a frame swivelly mounted on said last mentioned frame to swing relative thereto about an axis at right angles to the axis of swinging movement of said last mentioned swivelled frame, a drilling tool carried by said last mentioned swivelled frame and adjustable into diilerent angularly related drilling positions relative to said supporting structure about said axes oi. swinging movement said two last mentioned swivelled frames, mo-

tor operated means for rotating and axially reed-v I!!! said drilling tool relative to said swivelled frames while the latter and said supporting,

a structure remain stationary as regards swinging movement, and a motor common toboth 0! said motor operated means'ior actuating the latter. 1 I

5. In a drilling apparatus, a portable base, a

support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said first support to swing relative thereto about a horizontal axis, an elongated boom extending a substantial distance in ad- Vance of said base and mounted at its rear ex-.

trerni'ty on said second support for rotation rela- I tive thereto about its longitudinal axis, a drili' drill support, and a motor on said base relative to which said boom, supports, and drilling tool are adjustable, for driving said drilling tool.

6. In a drilling apparatus, a portable base, a Support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said first support to swing relative thereto about a horizontal axis, an elongated boom extending a substantial distance in advance of said base and mounted at its rear extremity on said second support for rotation relative thereto about its longitudinal axis, a drill support mounted on the outer extremity of said boom to swing relative thereto about an axis atright anglen to, the boom axis, a. drilling tool swivelly mounted onsaid d rill support about an axis at right anglestothe swivel axis of said drillsupport, and a motor on said base relative to which said boom, supports, and drilling tool are adiustabie, for driving said drillingtool and for swinging said second support about its pivot.

amass-1 'l. In a drilling apparatus, a portable base, a

support mounted on said base for rotation relativethereto about a vertical axis, a second support mounted "on said first-support to swing relative thereto about a horizontal axis, anelongated boom extending a substantial distance in advance 01' said ,base and mounted at its rear extremity onsaid second support for rotation relative thereto about its longitudinal axis, a drill support mounted on the outer'extremity of said boom to swing relative thereto about an axis at right angles to the boom axis, adrilling tool swivelly mounted on said drill support about an axis at right angles to. the swivel axis of said drill support, and a motor ,on said base relative to which said boom, supports, and drilling tool are adjustable, for driving said drilling tool, Ior swinging said second support about its pivot, and for rotatingjsaid boom about its longitudinal axis 1 relative to said second support.

' 8. In a drilling apparatus, a portable base, a support mounted on said base for rotation relajtive thereto about a vertical axis, a second support mounted on said first support to swing relative thereto about a horizontal axis, an elongated boom extending a substantial distance in advan'ce of said base and mounted at its rear extremity on said second support for rotation relative thereto about its longitudinal axis, a drill support mounted on the outer extremity of said beomto swing relative thereto about an axis at right angles to the boom axis, a drilling tool swivellyfmounted on said drillsupport about an axis at right angles tothe swivel axis 01 said drill support, a 'motoron said base relative to which said boom, supports, and'drilling tool are adjustable, and means drivenv by said motor for 'driving said drilling tool .and including driving elements arranged with their axes alined with the support and tool axes and cooperating transmission connections including a transmission element extending longitudinally of said boom. 9. In a drilling apparatus, a portable base, a support mounted on said base for rotation about fa vertical axis, a second support mounted on said first support to swing relative thereto about ..a horizontal axis, an elongated boom mounted on said second support for rotation relative thereto about its longitudinal axis, a drilling tool carried at the outer extremity of said boom, a motor on said base relative to which said supports and boom are adjustable, means driven by said'motor for swinging said second support relative to said first support including a driving element arranged with its axis coincident with the axis offsaid first support and swinging connections' actuated by said driving element, and means driven by said driving element and including a rotating element secured to said boom, for rotating the latter relative to said second support. 

